(1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算.

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(1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算.(1)1.25*6.4*7(2)9.9*7.8+0.78

(1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算.
(1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算.

(1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算.
(1)1.25*6.4*7
=1.25*0.8*8*7
=1*56
=56
(2)9.9*7.8+0.78
=99*0.78+0.78
=0.78*(99+1)
=78
(3)0.77/0.55
=0.11*7/0.11*5
=7/5
(4)7.5*1.02
=7.5*(1+0.02)
=7.5+7.5*0.02
=7.2+0.15
=7.35
(5)3.7*2.8+12.5
=3.7*(3-0.2)+12.5
=11.1-0.74+12.5
=23.6-0.74
=22.86

(1)1.25*6.4*7
=1.25*0.8*8*7
=1*56
=56
(2)9.9*7.8+0.78
=99*0.78+0.78
=0.78*(99+1)
=78
(3)0.77/0.55
=0.11*7/0.11*5
=7/5
(4)7.5*1.02
=7.5*(1+0.02)
=7.5...

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(1)1.25*6.4*7
=1.25*0.8*8*7
=1*56
=56
(2)9.9*7.8+0.78
=99*0.78+0.78
=0.78*(99+1)
=78
(3)0.77/0.55
=0.11*7/0.11*5
=7/5
(4)7.5*1.02
=7.5*(1+0.02)
=7.5+7.5*0.02
=7.2+0.15
=7.35
(5)3.7*2.8+12.5
=3.7*(3-0.2)+12.5
=11.1-0.74+12.5
=23.6-0.74
=22.86

收起

(1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算. (1)1.25*6.4*7(2)9.9*7.8+0.78(3)0.77/0.55(4)7.5*1.02(5)3.7*2.8+12.5的简便计算 6.4×125%+1又5分之3÷(1-5分之1)+2×1.25分数四则运算 6.4*1.25(简便计算) 0.8x+3.2=7.212.5-3x=6.556.4÷x+14.8=24.21.2(x-0.64)=0.54x+12.5=3.5x7.3×2.1-0.9x=7.86递等式计算(能简则简)6.4×0.29+6.4×8.71+6.4===2.98×1.25×(4-0.8)×0.25===9.9×101-9.9===[0.68÷(3.2-3.03)+1.4]÷(6-0.6)===全部答出给一百!明 1、25+61+75+292、26×131-31×263、25×1.25×324、999.9+99.9+9.9+0.35、(20.2×0.4+7.88)÷4.26、(4/5+1/4)÷7/3+7/104/5的意思是5分之4 不要【应用题】别发5.6÷ 3/8 – 3/8 ÷6 6.4/7 × 5/9 + 3/7 × 5/9 7.5/2 -( 3/2 + 4/5 ) 8.7/8 + ( 1/8 + 1/9 ) 9.9 × 5/6 + 5/6 10.3/4 × 8/9 - 1/3 11.7 × 5/49 + 3/14 12.6 ×( 1/2 + 2/3 ) 13.8 × 4/5 + 8 × 11/5 14.31 × 5/6 – 5 六年级分数混合运算35道不要1.3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12× 5/6 – 2/9 ×3 4.8× 5/4 + 1/4 5.6÷ 3/8 – 3/8 ÷6 6.4/7 × 5/9 + 3/7 × 5/9 7.5/2 -( 3/2 + 4/5 ) 8.7/8 + ( 1/8 + 1/9 ) 9.9 × 5/6 + 5/6 10.3/4 × 8/9 - 6.4乘(1.25乘2.5)的巧算方法 6.4乘(1.25乘2.5)的巧算方法 计算下列各式(能简算的要简算) 2-(1-3/7+4/7) 0.27×7.2-2.7×0.71 (9.9+0.1-9.9+0.1)÷0.01好心的人帮帮忙吧 (9.9+0.1-9.9+0.1)÷0.0.1简算 在括号内填上合适的数3.1.6.4.9.9.12.16()() 因式分解:(1)、100²-101*99 (2)、6.4²+6.4*7.2+3.6² 找规律,填一填 (1) 10.24,6.4,4,(),() (2) 8,6.4,5.12,()...找规律,填一填(1) 10.24,6.4,4,(),()(2) 8,6.4,5.12,(),() 能简算要简算一.9.9-9.9*(9.9-9.9)二.36*3/4+53*3/4-75% 三2/9÷(4/15*5/6+5/6)四.605*99+605五.[1/2-(1/3-1/4)]÷5/24 能简算要简算一.9.9-9.9*(9.9-9.9)二.36*3/4+53*3/4-75% 三2/9÷(4/15*5/6+5/6)四.605*99+605五.[1/2-(1/3-1/4)]÷5/24 7/15÷[1.25-(2/5+1/4)] 能简便就简便 简算(1.25*9.9+1/8)/25/4