考点:运算定律与简便运算
专题:运算定律及简算
分析:(1)25×36×4,125×32,根据乘法交换律和结合律简算即可;
(2)135×99,49×99+49,99×38+38,102×56,根据乘法分配律简算即可;
(3)37+125+63+175,98+265+202,根据加法交换律和结合律简算即可;
(4)350÷14,根据除法的性质简算即可;
(5)其余的注意首先计算乘除、然后计算加减即可.
解答:
解:25×36×4
=25×4×36
=100×36
=3600
135×99
=135×(100-1)
=135×100-135
=13500-135
=13365
203-135÷5
=203-27
=176
97-12×6+43
=97-72+43
=25+43
=68
49×99+49
=49×(99+1)
=49×100
=4900
350÷14
=350÷7÷2
=50÷2
=25
175+25÷25+15
=175+1+15
=191
125×32
=125×8×4
=1000×4
=4000
37+125+63+175
=(37+63)+(125+175)
=100+300
=400
99×38+38
=38×(99+1)
=38×100
=3800
98+265+202
=98+202+265
=300+265
=565
102×56
=100×56+2×56
=5600+112
=5712
点评:此题主要考查了加法、乘法运算定律、除法的性质在计算中的应用,注意运算顺序.