【原】小学数学的学习也决定着孩子将来的学习生涯...
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
