45—50道五年级递等试计算（附答案）

显示全部楼层 · 2009-7-15 14:29:58

可以使简便算法，等
要附答案~！！！
不要光给式子不给答案哦……
谢谢大家‘’
随便什么题目，不过要递等式，要求附答案，。

千问 · 2009-7-15 14:29:58

0.64×25×7.8+2.2 =0.16*4*25*7.8+2.2 =0.16*100*7.8+2.2 =16*7.8+2.2 =127 2÷2.5+2.5÷2 =4/5+5/4 =2.05 194－64.8÷1.8×0.9 =194-36*0.9 =194-32.4 =161.6 36.72÷4.25×9.9 =8.64*9.9 =85.536 5180－705×6 =5180-4230 =950 24÷2.4－2.5×0.8 =10-2 =8 (4121+2389)÷7 =6510/7 =930 671×15-974 =10065-974 =9091 469×12+1492 =5628+1492 =7120 405×(3213-3189) =40...

千问 · 2009-7-15 14:29:58

194－64.8÷1.8×0.9 =194-36*0.9 =194-32.4 =161.6 36.72÷4.25×9.9 =8.64*9.9 =85.536 5180－705×6 =5180-4230 =950 24÷2.4－2.5×0.8 =10-2 =8 (4121+2389)÷7 =6510/7 =930 671×15-974 =10065-974 =...

千问 · 2009-7-15 14:29:58

1+1+2=2+2=4- - 哈哈哈哈哈...