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 =480×(375+625) =480000
=13×(100-1) =1300-13 =1287 5)75000 ÷ 125 ÷ 15 =5×8 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 =30 =396×100÷25 =396×4 =1584 =321×(81+19) =32100 13)222222 × 999999 =222222000000-222222 =222221777778 =111111×999999 =111111×(1000000-1) =111111000000-111111 =111110888889 15)56000 ÷ (14000 ÷ 16) =56000÷14000×16 16)654321 × 909090 +654321×90909 =654321×999999 =654321×(100000-1) =654321000000-654321 =654320345679 17)34 × 3535 -35 × 3434 =34×35×101-35×34×101 =27×1000÷125 =27×8 =216 19)345345 ÷ 15015 =350×4-3+8+2-1 =1400+6 =1406 21)75 × 45 + 17 × 25 =25×3×45+17×25 =600000+50000+4000-4-3-2+407+89 =65400+487 =65887
=48÷24×75÷25×81÷27 |
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