50道加法简便计算题 计算下面各题,怎样算简便就怎样算. 9.43-2.6+8.57-3.412×(14+16?13)375+
计算下面各题,怎样算简便就怎样算. 9.43-2.6+8.57-3.412×(14+16?13)375+
计算下面各题,怎样算简便就怎样算. 9.43-2.6+8.57-3.412×(14+16?13)375+, 计算下面各题,怎样算简便就怎样算. 9.43-2.6+8.57-3.4 12×( 1 4 + 1 6 - 1 3
(1)9.43-2.6+8.57-3.4,
=(9.43+8.57)-(2.6+3.4),
=18-6,
=12;
(2)12×(
1 4+
1 6?

1 3
),
=12×
1 4+12×
1 6-12×
1 3,
=3+2-4,
=5-4,
=1;
(3)375+450÷18×25,
=375+25×25,
=375+625,
=1000;
(4)(
4 5+
1 4)÷
7 3+
7 10,
=
21 20÷
7 3+
7 10,
=
+
7 10,
=
.
计算下面各题,怎样简便就怎样计算.235×16-13×11 ...
(1)235×16-13×11
=3760-143
=3617;
(2)36×25
=9×(4×25)
=9×100
=900;
(3)1086+68+332+114
=(1086+114)+(68+332)
=1200+400
=1600;
(4)(145-5×20)÷15
=(145-100)÷15
=45÷15
=3;
(5)1360÷17÷8
=1360÷(17×8)
=1360÷136
=10;
(6)25+75-25+75
=(25-25)+(75+75)
=0+150
=150.
计算下面各题,怎样简便就怎样算.(1)2.6÷0.5+8.8×2.5 &...
(1)2.6÷0.5+8.8×2.5
=5.2+(2.2×4×2.5)
=5.2+22
=27.2
(2)5.74×3.9+6.1×5.74
=5.74×(3.9+6.1)
=5.74×10
=57.4
(3)21.28÷(4.5-3.7)
=21.28÷0.8
=26.6
(4)(10-34.5÷15)×6.2
=(10-2.3)×6.2
=7.7×6.2
=47.74
计算下面各题,怎样简便就怎样计算。
7/16乘9减7乘7/16
=7/16*(9-7)
=7/16*2
=7/8
2 1/7除15/28乘1 5/21
=15/7*28/15*26/21
=104/21
3 5/8加4 7/8减1.625减2 3/8
=3+4-1-2+(5/8+7/8-5/8-3/8)
=4.5
(3/4减1/2减1/6)乘12
=3/4*12-1/2*12-1/6*12
=9-6-2
=1
例如:
6.9+4.8+3.1
=6.9+3.1+4.8
=10+4.8
=14.8
0.456+6.22+3.78
=0.456+10
=10.456
式子中出现了27,应该是57,结果是正确的
4*(25*57)
=(4*25)*57
=100*57=5700