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小学阶段简便运算公式整理+练习题(附步骤及答案)

小学数学的学习也决定着孩子将来的学习生涯,所以作为家长我们需要还孩子提供最适合的学习方法,帮助他们提高学习成绩。今天,老师给大家分享一下小学阶段简便运算公式整理+练习题,希望对大家有帮助。

小学阶段简便运算公式整理

加法交换律: a+b = b+a

加法结合律:(a+b)+c = a+(b+c)

乘法交换律:a×b = b×a

乘法结合律:(a×b)×c = a×(b×c)

乘法分配律:

(a+b)×c = a×c+b×c

(a-b)×c = a×c-b×c

其它性质

a-b-c = a-(b+c) a÷b÷c = a÷(b×c)

小学阶段简便运算公式整理习题答案

84x101

=84x(100+1)

=84x100+84x1

=8400+84

=8484

78x102

=78x(100+2)

=78x100+78x2

=7800+156

=7956

25x(4+8)

=25x4+25x8

=100+200

=300

125x(35+8)

=125x35+125x8

=4375+1000

=5375

99x64

=(100-1)x64

=100x64-1x64

=6400-64

=6336

99X13+13

=(99+1)x3

=100x3

=300

32X16+14X32

=(16+14)x32

=30x32

=960

78X4+78X3+78X3

=(4+3+3)x78

=10x78

=780

125X32X8

=125x8x32

=1000x32

=32000

3600÷25÷4

=3600÷(25x4)

=3600÷100

=36

8100÷4÷75

=8100÷(4x75)

=8100÷300

=27

25X32X125

=25x4x8x125

=(25x4)x(8x125)

=100x1000

=100000

1200-624-76

=1200-(624+76)

=1200-700

=500

273-73-27

=273-(73+27)

=273-100

=173

278+463+22+37

=(278+22)+(463+37)

=300+500

=800

425+14+186

=425+(14+186)

=425+200

=625

214-(86+14)

=214-100

=114

365-(65+118)

=365-65-118

=300-118

=282

178X101-178

=178x(101-1)

=178x100

=17800

83X102-83X2

=83x(102-2)

=83x100

=8300

35X127-35X16-11X35

=35x(127-16-11)

=35x100

=3500

易错题

600-60÷15

=600-4

=596

20X4÷20X4

=80÷20x4

=4x4

=16

736-35X20

=736-700

=36

25X4÷25X4

=100÷25x4

=4x4

=16

175-75÷25

=175-3

=172

36X9÷36X9

=36÷36x9x9

=1x9x9

=81

25X8÷(25X8)

=200÷200

=1

100+45-100+45

=100-100+45+45

=45+45

=90

100-36+64

=64+64

=128

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