1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
2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
3樓:
懸賞太低 你正考試 所以算了
用遞等式計算,能簡算的要簡算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2
4樓:匿名使用者
(du1)25×zhi12-850÷
dao17
=25×4×3-50,
=300-50,
=250;
(2)(3.2÷16+10.8)÷22
=(0.2+10.8)÷22,
=11÷22,
=0.5;
(3)3.2×12.5×2.5
=0.8×4×12.5×2.5,
=(12.5×0.8)×(2.5×4),
=10×10,
=100;
(4)7.05-3.84-0.16-1.05=7.05-1.05-(3.84+0.16),=6-4,
=2;(5)8
17×9-8÷17 8
=817
×9-8×8
17,=(9-8)×8
17,=1×8
17,=8
17;(6)5 6
×[2÷(7 8
-3 4
)]=5 6
×[2÷1 8
],=5 6
×16,
=40 3.
遞等式計算(能簡便的用簡便方法計算)謝謝
5樓:匿名使用者
0.8×(0.25+2.
5+25)×0.4=0.8×(0.
25×0.4+2.5×0.
4+25×0.4)=0.8×0.
1+0.8×1+0.8×10=0.
08+0.8+8
=8.88
用遞等式計算能簡算的要簡算,用遞等式計算能簡算要簡算
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