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