小学四年级数学下简便计算练习题(小学四年级数学简便计算专项训练)
小学四年级数学下简便计算练习题(小学四年级数学简便计算专项训练)6)7900 ÷ 4 ÷ 255)75000 ÷ 125 ÷ 15 2)375 × 480 6250 × 48 3)25 × 16 ×125 4)13 × 99
小学四年级数学,简便计算专项训练。
专项训练,效果更好!
基础题:
1)125 ×(17 × 8)× 4
2)375 × 480 6250 × 48
3)25 × 16 ×125
4)13 × 99
5)75000 ÷ 125 ÷ 15
6)7900 ÷ 4 ÷ 25
7)150 × 40 ÷ 50
8)5600 ÷(25 × 7)
9)210 ÷ 42 × 6
10)39600 ÷ 25
11)67 × 21 +18 × 21 85 × 79
12)321 × 81 321 × 19
13)347 358 352 349
四年级数学简便计算题及答案:
1)125 ×(17 × 8)× 4
= 125×8×4×17
=1000×68
=68000
=480×(375+625)
=480000
3)25 × 16 ×125
=25×2×8×125
=50000
4)13 × 99
=13×(100-1)
=1300-13
=1287
5)75000 ÷ 125 ÷ 15
=75×1000÷125÷15
=75÷15×1000÷125
=5×8
=40
6)7900 ÷ 4 ÷ 25
=7900÷(4×25)
=79
7)150 × 40 ÷ 50
=150÷50×40
=3×40
=120
8)5600 ÷(25 ×7)
=56×100÷25÷7
=56÷7×100÷25
=32
9)210 ÷ 42 × 6
=210÷7÷6×6
=30
10)39600 ÷ 25
=396×100÷25
=396×4
=1584
11)67 × 21 +18 × 21 85 × 79
=21×(67 18) 85×79
=21×85 85×79
=85×(21 79)
=8500
12)321 × 81 321 × 19
=321×(81 19)
=32100
13)222222 × 999999
=222222×(1000000-1)
=222222000000-222222
=222221777778
14)333333 × 333333
=111111×999999
=111111×(1000000-1)
=111111000000-111111
=111110888889
15)56000 ÷ (14000 ÷ 16)
=56000÷14000×16
=4×16
=64
16)654321 × 909090 654321×90909
=654321×999999
=654321×(100000-1)
=654321000000-654321
=654320345679
17)34 × 3535 -35 × 3434
=34×35×101-35×34×101
=0
18)27000 ÷ 125
=27×1000÷125
=27×8
=216
19)345345 ÷ 15015
=345×1001÷(15×1001)
=345÷15×1001÷1001
=23
20)347 358 352 349
=350×4-3 8 2-1
=1400 6
=1406
21)75 × 45 17 × 25
=25×3×45 17×25
=25×(135 17)
=25×152
=25×4×38
=3800
22) 599996 49997 3998 407 89
=600000 50000 4000-4-3-2 407 89
=65400 487
=65887
23)(48 × 75 ×81)÷(24 × 25 × 27)
=48 × 75 ×81÷24÷25÷27
=48÷24×75÷25×81÷27
=2×3×3
=18