2.8+549 +7.2+359 438 +2.25+558 +734 725 +457 +235 53611 －1647 +16511
237 +359 －337 +149 +147 0.75+58 +14 +0.375 45 ＋945 +9945 +99945 +999945
445 －(245 +512 ) 5-21417 -1317 48.3-1516 -456 956 ×4.25+41
4 ÷6
0.625×0.5+58 +12 ×62.5% 3138 ×72513 ÷3138 2.5×(910 +910 +9
10
+910 )
22×34 +25×75%-7×0.75 0.25×63.5－14 ×1312 6715 ×2.5-212 ×
4715 389 +3.125+119 +178 1645 +(24
7 -1.8)
49.5×1035 -(50-12 )×0.6 711 ×41419 +5519 ÷147 +711 45×(79 +4
15
－0.6)
897×38 －37.5%+104×0.375 314 ×(538 －5.375) 3.5×114 +1.25×27
10 +3.8÷
4
5
1. 71×99
2. 3755+2996
3. 8439+1001
4. 446+295
5. 888+999
6. 1125-996
7. 299×101 8. 563×999 9. 2100÷20
10. 6÷0.25 11. 72×156-56×72 12. 25×32×125
13. 709×99+709 14. 0.25×48 15. 2.5×37 0.4×21
3
16. 212×6.6+2.5×63
5 17. 75.3×99+75.3
18. 4.6×3.7+54×0.37 19. 0.125×34+1
8×8.25+12.5%
