314x7-189x7+125 =(314-189)x7+125 =125x7+125 =125x(7+1) =1000
1.85乘27=85乘(20+7)=85乘20+85乘7 2.52乘22=(50+2)乘(20+2)=结果自己算采纳吧
(72+6)÷9=8+2/3=26/3
943除以3= 9除以3=3 43除以3=11所以=311
340-128 =300-100+40-28 =212 9×18 =9×10+9×8 =162
第一个 = 0.5+0.04+0.4+0.05 给财富值,告诉全部答案 =0.5+0.4+0.04+0.05 =0.9+0.09 =0.99