6.4*125+12.5*36减算

题目

6.4*125+12.5*36减算
还有59分之31*23+31*59分之36+100.
是6.4

答案

1.原式=64×12.5+12.5×36
=（64+36）×12.5
=100×12.5
=1250
2.原式=31/59 ×（23+36）+100
=31/59 ×59 +100
=31+100
=131