1樓:匿名使用者
(1)5.03-2.5+0.96,
=2.53+0.96,
=3.49;
(2)35.72-(5.9+5.72),
=35.72-5.9-5.72,
=35.72-5.72-5.9,
=30-5.9,
=24.1;
(3)25-4.7+5.3,
=20.3+5.3,
=25.6;
(4)1.3+2.83+8.7+0.17,=(1.3+8.7)+(2.83+0.17),=10+3,
=13;
(5)2.47-2.2-3.8+7.53,=(2.47+7.53)-(2.2+2.8),=10-5,=5.
用遞等式計算,能簡算的要寫出簡算過程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2×12.
2樓:最強黑客
(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),
=3.7×1,
=3.7.
用遞等式計算(能簡算要簡算)
3樓:強肚很大
(3/4-2/3)÷
(1/6+1/8)
=(9/12-8/12)÷(4/24+3/24)=1/12÷7/24
=1/12×24/7
=2/7
12÷(2/3+5/6)
=12÷(4/6+5/6)
=12÷9/6
=12×2/3
=83-(1/8+3/4÷3/8)
=3-1/8-3/4×8/3
=3-1/8-2
=1-1/8
=7/8
5/8×2/7+5/8÷7/5
=5/8×2/7+5/8×5/7
=5/8×(2/7+5/7)
=5/8×1
=5/8
1/5+4/9×3/8+5/6
=1/5+1/6+5/6
=1/5+1
=6/5
4樓:小老周
(3/4-2/3) / (1/6+1/8)=(18/24-16/24) / (4/24+3/24)=2/24 / 7/24
=2/24x24/7
=2/7
12 / (2/3+5/6)
=12 / (4/6+5/6)
=12 / 11/12
=12x12/11
=13 1/11
5樓:
懸賞太低 你正考試 所以算了
用遞等式計算,能簡算的要寫出簡算過程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2
6樓:ta剋
(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),
=3.7×1,
=3.7.
用遞等式計算,能簡算的要簡算.(1)100.18-9.6+18.53(2)0.963+23.89-0.063(3)2.5×0.3÷2.5×0.3(
7樓:我是微涼
(1)100.18-9.6+18.53,
=90.58+18.53,
=109.11;
(2)0.963+23.89-0.063,=(0.963-0.063)+23.89,=0.9+23.89,
=24.79;
(3)2.5×0.3÷2.5×0.3,
=2.5÷2.5×0.3×0.3,
=1×0.3×0.3,
=0.09;
(4)2.8×10.1,
=2.8×(10+0.1),
=2.8×10+2.8×0.1,
=28+0.28,
=28.28;
(5)51×1.2-1.2,
=(51-1)×1.2,
=50×1.2,
=60;
(6)0.36×(15.23-9.63),=0.36×5.6,
=2.016.
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