小学四年级数学180道简便计算题及答案
河北环境工程学院-表白
小学四年级数学180道简便计算题及答案
1) 25×16×125
=25×2×8×125
=50000
=1287
2) 13×99
=13×(100-1)
=1300-13
=1287
3)
75000 ÷ 125÷ 15
=75×1000÷125÷15
=75÷15×1000÷125
=5×8
=40
4) 7900 ÷
4 ÷ 25
=7900÷(4×25)
=79
5) 150 ×40÷ 50
=150÷ 50×40
=3×40
可编辑范本
=120
6)5600 ÷ (25×7)
=56×100÷
25÷ 7
=56÷ 7×100÷ 25
=32
7) 39600 ÷ 25
=396×100÷25
=396×4
=1584
8) 210 ÷
42×6
=210÷ 7÷6×6
=30
9) 27000 ÷ 125
=27×1000÷125
=27×8
=216
10)
654321×909090 +654321×90909
=654321 ×999999
=654321 ×(100000-1)
=654321000000-654321
11) 599996 + 49997 + 3998 + 407 + 89
=600000+50000+4000-4-3-2+407+89
可编辑范本
=65400+487
=65887
12) (48 × 75
×81) ÷ (24 ×25 ×27)
=48÷24×75÷25×81÷27
=2×
3 × 3
=18
可编辑范本