用简便方法计算78x9.9简便方法计算
用简便方法计算78x9.9简便方法计算
78x9.9
=78x(10-0.1)
=78x10-7.8
=780-7.8
=772.2
祝天天向上。
用简便方法计算。。。一定要用简便方法计算
52/53×107=52/53×(106+1)=104+52/53
25×32×1.25=25×4×8×1.25=110
1/42+1/56+1/72=(1/6-1/7)+(1/7-1/8)+(1/8-1/9)=1/6-1/9=1/18
脱式计算.(能用简便方法计算用简便方法计算)70.08-1.25-1.75 4....
(1)70.08-1.25-1.75,
=70.08-(1.25+1.75),
=70.08-3,
=67.08;
(2)4.6+2.89+5.4+3.11,
=(4.6+5.4)+(2.89+3.11),
=10+6,
=16;
(3)22×101,
=22×100+22×1,
=2200+22,
=2222;
(4)45×36+54×36+36,
=(45+54+1)×36,
=100×36,
=3600;
(5)25×(4×27),
=(25×4)×27,
=100×27,
=2700;
(6)85×99+85,
=85×(99+1),
=85×100,
=8500.
用简便演算法计算 用简便方法计算26×29 +39×14
26X29+39X14
=26X(30-1)+(40-1)X14
=26X30-26+40X14-14
=780+560-26-14
=1340-(26+14)
=1340-40
=1300
脱式计算,能用简便方法计算用简便方法.6.4×4.5+3.6×4.5 &...
(1)6.4×4.5+3.6×4.5
=(6.4+3.6)×4.5
=10×4.5
=45;
(2)16.38÷0.36-4.8
=45.5-4.8
=40.7;
(3)0.85+0.2×1.35
=0.85+0.27
=1.12;
(4)4.38÷0.125÷0.8
=4.38÷(0.125×8)
=4.38÷1
=4.38.
脱式计算,能用简便方法计算用简便方法.17.5÷12.5×1.4 &nb...
(1)17.5÷12.5×1.4
=1.4×1.4
=1.96;
(2)1.58×99+1.58
=1.58×(99+1)
=1.58×100
=158;
(3)4.38÷0.125÷0.8
=4.38÷(0.125×0.8)
=4.38×0.1
=0.438;
(4)6.4×4.5+3.6×4.5
=(6.4+3.6)×4.5
=10×4.5
=45.
用简便方法计算890000÷25÷25÷4÷4用简便方法计算怎么解
用简便方法计算890000÷25÷25÷4÷4用简便方法计算怎么解
890000÷25÷25÷4÷4
=890000÷(25*4*25*4)
=890000÷10000
=89
3.计算(能用简便方法计算的要用简便方法)
1/2+1/6+1/12+1/20+1/30
=30/60+10/60+5/60+3/60+2/60
=(30+10+5+3+2)/60
=50/60
=5/6
祝你开心
用简便方法计算。302-119用简便方法计算,302,减119,等于。
302-119
=300-100+2-19
=(300-100)-(19-2)
=200-17
=183
简便方法计算35×104。简便方法计算35乘104
简便方法计算35×104
35×104
=35*(100+4)
=35*100+35*4
=3500+140
=3640