脱式计算(脱式计算及答案)
脱式计算大全及答案
1.
4×102-2×49
=408-2×49
=408-98
=310
2.
25×(2+4)
=25×2+25×4
=50+100
=150
3.
12×5+8
=60+8
=68
4.
99×101
=99×(100+1)
=99×100+99×1
=9900+99
=9999
5.
25×(78×4)
=25×4×78
=100×78
=7800
6.
(25+12)×4
=25×4+12×4
=100+48
=148
7.
1.4+0.7+8.6
=(1.4+8.6)+0.7
=10+0.7
=10.7
8.
56×27+27×44
=27×(56+44)
=27×100
=2700
9.
56×99+56
=56×(99+1)
=56×100
=5600
10.
125×25×8×4
=(25×4)×(125×8)
=100×1000
=100000
12.
25×125×4
=(25×4)×125
=100×125
=12500
13.
125×47-47×25
=47×(125-25)
=47×100
=4700