Question

六年级计算题简：（8/15+7/12+11/30）乘以60；3.625乘以7.75+3.625乘以1.25+3.625；

Answer 1

简答：

（8/15+7/12+11/30）乘以60；

=(8/15)*60+(7/12)*60+(11/30)*60

=32+35+22

=89

3.625乘以7.75+3.625乘以1.25+3.625；

=3.625*(7.75+1.25+1)

=3.625*10

=36.25

9乘以2/7+5/7乘以9；

=9*(2/7+5/7)

=9*1

=9

12乘以（1/4+1/6-1/3）；

=12*(1/4)+12*(1/6)-12*(1/3)

=3+2-4

=1

解方程：

0.25X+1/2=1；

0.25X+0.5=1

0.25X=0.5

X=2

1/3X-4=60;

1/3X=64

X=64*3

X=192

1.9-(X+1/2)=1/5;

1.9-(X+0.5)=0.2;

1.9-X-0.5=0.2

X=1.2

9.8-2X=0.2

2X=9.6

X=4.8