人教版四年级数学下册小数加减法简便计算专项练习题85
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9.2 +1.98 +0.8 =9.2 +____ +1.98( 5.64 +3.12 ) +5.88 =____ +( ____ +____ )17.03 -3.3 -6.7 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
4.66 +5.8 +3.2 8.64 -2.8 -2.26.86 -3.2 +2.14 10.7 +0.16 +0.84 +9.3 1.6 +3.6 +4.3 9.56 -2.66 -2.3421 +8.4 +7.2 +42 4.09 +4.05 +1.954.17 +7.66 +3.83 0.97 +8.2 +6.03 +1.8 4.7 +3.49 +6.51 +2.3 7.65 +9.32 -4.653.7 +1.11 +6.3 =3.7 +____ +1.11( 9.96 +2.73 ) +6.27 =____ +( ____ +____ )11.32 -6.2 -3.8 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
7.34 +2.7 +3.3 7.73 -3.3 -2.74.78 -2.3 +4.22 0.1 +0.26 +0.74 +27.9 7.1 +5.9 +8.1 7.08 -1.02 -4.9824 +4.2 +5.1 +84 0.17 +3.25 +6.751.08 +9.87 +7.922.02 +8.3 +5.98 +1.72.1 +3.96 +2.04 +6.9 8.89 +2.76 -5.899.8 +8.85 +0.2 =9.8 +____ +8.85( 6.14 +3.62 ) +6.38 =____ +( ____ +____ )19.76 -5.4 -4.6 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
8.15 +1.1 +5.9 8.25 -3.2 -0.85.71 -1.1 +2.296.8 +0.34 +0.66 +21.2 4.2 +1.9 +2.8 8.47 -3.84 -0.1664 +1.3 +1.6 +39 6.85 +4.35 +5.651.51 +5.78 +5.492.78 +0.7 +6.22 +9.3 0.4 +2.08 +5.92 +7.6 6.22 +6.98 -2.222.1 +2.99 +7.9 =2.1 +____ +2.99( 1.27 +3.67 ) +2.33 =____ +( ____ +____ )40.35 -5.4 -4.6 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
4.31 +1.3 +8.7 9.94 -2.1 -2.95.39 -1.1 +2.61 15.9 +0.28 +0.72 +12.16.3 +9.9 +9.77.85 -2.35 -3.6571 +6.4 +4.6 +42 2.96 +1.81 +6.190.41 +3.15 +7.59 4.34 +5.2 +1.66 +4.8 5.2 +3.85 +5.15 +2.8 8.27 +7.56 -4.276.8 +5.62 +3.2 =6.8 +____ +5.62( 7.15 +2.26 ) +6.74 =____ +( ____ +____ )20.17 -5.3 -4.7 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
1.38 +5.3 +0.7 6.51 -1.1 -3.96.56 -2.5 +1.44 11.1 +0.43 +0.57 +12.9 8.7 +9.1 +4.8 8.15 -1.39 -4.6111 +3.4 +7.6 +34 8.39 +3.89 +2.113.51 +6.79 +3.49 2.58 +2.7 +3.42 +7.3 3.5 +1.17 +8.83 +5.5 7.66 +7.89 -6.667.5 +4.27 +2.5 =7.5 +____ +4.27( 7.76 +3.01 ) +2.99 =____ +( ____ +____ )40.83 -5.7 -4.3 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
1.23 +4.1 +3.9 6.24 -3.1 -0.94.09 -3.7 +3.91 14.1 +0.41 +0.59 +12.9 3.9 +6.1 +6.8 9.68 -3.47 -0.5318 +8.8 +9.4 +45 0.51 +4.01 +1.995.67 +1.26 +4.33 0.56 +7.8 +5.44 +2.2 4.7 +0.66 +5.34 +1.3 7.19 +9.14 -6.196.1 +6.53 +3.9 =6.1 +____ +6.53( 5.82 +4.91 ) +2.09 =____ +( ____ +____ )21.87 -5.7 -4.3 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
2.51 +3.1 +4.9 7.31 -1.4 -4.66.63 -1.1 +0.37 13.6 +0.05 +0.95 +14.4 6.3 +8.4 +5.4 9.37 -2.99 -2.0156 +6.5 +6.8 +64 6.32 +1.12 +8.883.59 +7.73 +6.41 5.25 +4.8 +0.75 +5.2 0.7 +1.85 +4.15 +9.36.68 +0.19 -5.688.1 +2.36 +1.9 =8.1 +____ +2.36( 2.66 +4.16 ) +4.84 =____ +( ____ +____ )18.83 -5.2 -4.8 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
4.18 +4.7 +1.3 8.12 -1.2 -4.85.73 -3.8 +4.27 12.1 +0.41 +0.59 +15.9 4.8 +7.5 +8.1 8.32 -2.71 -1.2991 +6.7 +6.8 +62 0.77 +0.55 +6.451.58 +8.58 +4.42 3.34 +7.8 +6.66 +2.2 4.2 +1.92 +8.08 +2.8 7.62 +9.94 -3.626.2 +2.82 +3.8 =6.2 +____ +2.82( 6.35 +3.71 ) +6.29 =____ +( ____ +____ )33.64 -1.4 -8.6 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
5.45 +4.5 +4.5 7.77 -3.2 -1.85.55 -1.9 +3.45 12.3 +0.05 +0.95 +17.7 4.8 +6.7 +4.5 8.65 -0.23 -3.7726 +5.9 +1.9 +57 5.13 +3.64 +5.363.92 +1.43 +2.08 1.38 +8.7 +8.62 +1.34.6 +0.16 +8.84 +3.4 8.88 +1.58 -3.887.3 +9.35 +2.7 =7.3 +____ +9.35( 6.33 +1.42 ) +7.58 =____ +( ____ +____ )32.77 -3.8 -6.2 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
6.94 +1.3 +5.7 8.24 -2.2 -3.84.71 -3.2 +5.29 12.9 +0.32 +0.68 +15.1 8.5 +2.7 +8.2 9.91 -1.99 -5.0123 +1.4 +9.4 +21 1.91 +5.44 +1.563.33 +0.69 +5.67 2.06 +8.7 +6.94 +1.3 2.4 +2.61 +3.39 +5.6 8.29 +1.87 -4.296.9 +7.01 +3.1 =6.9 +____ +7.01( 5.32 +2.61 ) +3.39 =____ +( ____ +____ )16.55 -7.3 -2.7 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
8.95 +3.3 +5.7 6.98 -1.4 -4.66.78 -3.5 +0.22 11.8 +0.18 +0.82 +12.27.8 +6.5 +9.6 9.87 -3.56 -1.4467 +9.4 +5.8 +69 8.04 +5.85 +3.151.62 +1.21 +5.38 1.09 +5.8 +8.91 +4.2 0.8 +3.95 +2.05 +6.2 9.76 +5.11 -6.765.2 +9.58 +4.8 =5.2 +____ +9.58( 7.75 +2.52 ) +3.48 =____ +( ____ +____ )47.15 -3.8 -6.2 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
8.85 +1.7 +5.3 6.77 -2.7 -2.36.63 -3.3 +1.37 3.2 +0.26 +0.74 +23.8 9.1 +5.9 +8.3 9.73 -0.75 -5.2564 +4.3 +5.4 +51 9.04 +4.97 +2.034.38 +6.81 +2.62 3.89 +2.8 +2.11 +7.2 3.9 +4.16 +1.84 +2.1 7.27 +2.83 -2.274.1 +8.42 +5.9 =4.1 +____ +8.42( 7.56 +4.52 ) +2.48 =____ +( ____ +____ )11.72 -1.2 -8.8 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。
1.88 +1.4 +5.6 8.59 -3.9 -0.16.39 -2.8 +0.61 0.5 +0.65 +0.35 +25.5 3.5 +1.1 +2.77.22 -0.26 -4.7471 +1.1 +9.6 +45 6.73 +4.05 +3.953.69 +2.57 +6.31 5.17 +9.6 +3.83 +0.4 3.9 +4.65 +2.35 +5.1 8.08 +0.86 -7.086.2 +9.91 +3.8 =6.2 +____ +9.91( 1.43 +1.46 ) +7.54 =____ +( ____ +____ )31.51 -1.7 -8.3 =____ 〇( ____ 〇____ )二、下面各题怎样简便怎样计算。