Question

求脱式计算三年级10道带答案。

Answer 1

0.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100

=1000

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×(1.24+1.76)

=8.3×3

=24.9

9999×1001

=9999×(1000+1)

=9999×1000+9999×1

=10008999

14.8×6.3-6.3×6.5+8.3×3.7

=(14.8-6.5)×6.3+8.3×3.7

=8.3×6.3+8.3×3.7

= 8.3×(6.3+3.7)

=8.3×10 =83

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

933-157-43

=933-(157+43)

=933-200

=733

脱式计算题是指一种需要用递等式计算的题目,每行计算必须要等号在前,结果在后.

举个例子：

99+1-35*2

= 99+1-70

= 100-70

= 30

需要注意的地方：

必须由左到右,且按照“先乘除后加减”的法则运算,同时依次按先算小括号、中括号、大括号里的数.可以运用各种运算法则使其计算更简便与准确.(注：式子可含字母.)

Answer 2

从某本练习册上摘抄就行了😁