四年级数学简便计算题及答案
基础题:
1)125 ×(17 × 8)× 4 2)375 × 480 + 6250 × 48
3)25 × 16 ×125
5)75000 ÷ 125 ÷ 15 7)150 × 40 ÷ 50 7)
9)210 ÷ 42 × 6 11)67 × 21 +18 × 21 + 85 × 79 321 × 19
13)347 + 358 + 352 + 349
四年级数学简便计算题及答案:
4)13 × 99
6)7900 ÷ 4 ÷ 25
8)5600 ÷(25 × 10)39600 ÷ 25 12)321 × 81 +
1)125 ×(17 × 8)× 4 2)375 × 480 + 6250 × 48
= 125×8×4×17 =480×(375+625)
=1000×68 =480000
=68000
3)25 × 16 ×125 =25×2×8×125 =50000 5)75000 ÷ 125 ÷ 15 =75×1000÷125÷15 =75÷15×1000÷125 =5×8
=40
4)13 × 99
=13×(100-1)
=1300-13
6)7900 ÷ 4 ÷ 25
=7900÷(4×25)
=79
=1287
7)150 × 40 ÷ 50 8)5600 ÷(25 × 7)
=150÷50×40 =56×100÷25÷7
=3×40 =120 9)210 ÷ 42 × 6 =210÷7÷6×6 =396×100÷25
=30 11)67 × 21 +18 × 21 + 85 × 79 =21×(67+18)+85×79 =21×85+85×79 =85×(21+79)
=56÷7×100÷25
=32
10)39600 ÷ 25 =396×4
=1584
12)321 × 81 + 321 × 19
=321×(81+19) =32100
=8500
13)222222 × 999999 14)333333 × 333333
=222222×(1000000-1) =111111×999999
=222222000000-222222 (1000000-1)
=222221777778 -111111
15)56000 ÷ (14000 ÷ 16) 90909 =56000÷14000×16 =4×16 = 17)34 × 3535 -35 × 3434 =111111× =111111000000 =1111108888
16)6321 × 909090 +6321× =6321×999999
=6321×(100000-1)
=6321000000-6321
=6320345679
18)27000 ÷ 125
=34×35×101-35×34×101 =27×1000÷125
=0 =27×8
=216
19)345345 ÷ 15015 352 + 349
=345×1001÷(15×1001) 3+8+2-1
=345÷15×1001÷1001 =23 21)75 × 45 + 17 × 25 407 + =600000+50000+4000-4-3-2+407+
=25×(135+17) =25×152 =25×4×38
20)347 + 358 + =350×4- =1400+6
=1406
22) 599996 + 49997 + 3998 +
=25×3×45+17×25 =600+487
=65887
=3800
23)(48 × 75 ×81)÷(24 × 25 × 27)
=48 × 75 ×81÷24÷25÷27
=48÷24×75÷25×81÷27
=2×3×3
=18
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