能簡算的要簡算:1、125又3/8x(9又2/4-3.72+3.25-1又7/25) 2、(8又5/7-1.625-3又3/8)÷1又6/7
1、125又3/8x(9又2/4-3.72+3.25-1又7/25)
=1003/8×(12+3/4-5)
=1003/8×31/4
=31093/32
第1題有沒有打錯數位?
1、125又3/8x(9又3/4-3.72+3.25-1又7/25)這裡是3/4
=1003/8×(13-5)
=1003/8×8
=1003
2、(8又5/7-1.625-3又3/8)÷1又6/7
=(8+5/7-5)×7/13
=26/7×7/13
=2
9.4×1/4+0.25×3/5簡算
9.4×1/4+0.25×3/5=9.4×0.25+0.25×0.6=0.25×(9.4+0.6)=0.25×10=2.5
0.8*3.9*1.25怎樣簡算
0.8*3.9*1.25
=(0.8*1.25)*3.9
=1*3.9
=3.9
6.3*9.9簡算7.34*6.4-6.4*3.25*0.72簡算
6.3*9.9
=6.3x(10-0.1)
=6.3x10-6.3x0.1
=63-0.63
=62.37
7.34*6.4-6.4*3.25*0.72
= 7.34*6.4-6.4*2.34
=6.4x(7.34-2.34)
=6.4x5
=32
{3/4-(7/16-0.25)}*16/9簡算
{3/4-(7/16-0.25)}*16/9
=(3/4+1/4-7/16)*16/9
=9/16*16/9
=1
用遞等式計算(能簡的要簡算).1.25÷5
用遞等式計算(能簡的要簡算).1.25÷5+0.25x20
1.25÷5+0.25x20
=0.25+5
=5.25
1.6×1.25×0.5簡算,遞等式
 ;
(22.4-12.8)/0.64/0.
=9.6÷(0.64×0.5)
=9.6÷0.32
=30
(5/12)/(2/3)-3/8*4/9簡算
(15分之8 + * 3分之2)/ 12分之1
就這些能簡算的要簡算➹;➹;急
(5/12)/(2/3)-3/8*4/9
=5/12×3/2-1/6
=5/4×1/2-1/6
=5/8-1/6
=15/24-4/24
=11/24
(15分之8 + 20分之9 * 3分之2)/ 12分之1
=(15分之8 + 20分之9 * 3分之2)×12
=15分之8×12+10分之3×12
=5分之32+5分之18
=5分之50
=10
12.8+2.04×9.5能不能簡算
如果需要簡算的話,是可以的:
12.8+2.04×9.5
=12.8+(2+0.04)×(10-0.5)
=12.8+2×10-2×0.5+0.04×10-0.04×0.5
=12.8+20-1+0.4-0.02
=32.18