脱式计算简算题四年级 脱式计算,能简算的要简算.(1)( 5 6 + 7 12 + 3 8 )÷ 1
脱式计算,能简算的要简算.(1)( 5 6 + 7 12 + 3 8 )÷ 1
脱式计算,能简算的要简算.(1)( 5 6 + 7 12 + 3 8 )÷ 1
(1)( 5 6 + 7 12+
3 8)÷
1 48,
=(
+
7 12+
3 8)×48,
=
×48+
7 12×48+
3 8×48,
=40+28+18,
=86;
(2)[1-(
1 2+
1 3)×
1 5]÷
5 6,
=[1-(
+
2 6)×
1 5]×
6 5,
=[1-
×
1 5]×
6 5,
=[1-
]×
6 5,
=
×
6 5,
=1;
(3)6.46-(5.37-3.54),
=6.46-5.37+3.54,
=(6.46+3.54)-5.37,
=10-5.37,
=4.63;
(4)5.58-
3 5+5.42-
2 5,
=(5.58+5.42)-(
+
2 5),
=11-1,
=10.
脱式计算,能简算的要简算. 3 5 + 1÷( 5 6 - 5 8 ) ( 5 6 +
(1) 3 5 +1÷( 5 6-
5 8),
=
+1÷(
20 24-
15 24),
=
+1÷
5 24,
=
+1×
24 5,
=
;
(2)(
5 6+
2 3-
3 4)×24,
=
×24+
2 3×24-
3 4×24,
=20+16-18,
=18;
(3)
2 3+(
4 5-
1 6)×
8 18,
=
+(
24 30-
5 30)×
4 9,
=
+
19 30×
4 9,
=
+
38 135,
=
+
38 135,
=
;
(4)0.625×9.6+62.5%×
2 5,
=0.625×9.6+0.625×0.4,
=(9.6+0.4)×0.625,
=10×0.625,
=6.25.
脱式计算(能简算的简算).( 1 8 + 5 12 - 1 6 )×481.25×64×2.5
(1)( 1 8 + 5 12-
1 6)×48,
=
×48+
5 12×48-
1 6×48,
=6+20-8,
=18;
(2)1.25×64×2.5×0.5,
=1.25×8×4×2×2.5×0.5,
=1.25×8×(4×2.5)×(2×0.5),
=10×10×1,
=100;
(3)693×99+693,
=(99+1)×693,
=100×693,
=69300;
(4)
9 20÷[
1 2×(
2 5+
4 5)],
=
÷[
1 2×
6 5],
=
÷
3 5,
=
×
5 3,
=
.
脱式计算,能简算的要简算 11 12 -( 1 6 + 1 8 ) 8 9
(1) 11 12 -( 1 6+
1 8),
=
-(
4 24+
3 24),
=
-
7 24,
=
;
(2)
8 9-
1 6+
1 9-
1 6,
=(
+
1 9)-(
1 6+
1 6),
=1-
,
=
;
(3)1-
1 4+
3 4,
=
+
3 4,
=
;
(4)
1 2-(
3 4-
3 8),
=
-(
6 8-
3 8),
=
-
3 8,
=
.
脱式计算.(能简算的要简算)( 3 4 + 1 2 - 7 12 )×24 ( 5
(1)( 3 4 + 1 2-
7 12)×24,
=24×
+
1 2×24-
7 12×24,
=18+12-14,
=30-14,
=16;
(2)(
5 12×
3 4)× 1
1 3,
=
×(
3 4× 1
1 3),
=
×1,
=
;
(3)
15 16÷(
5 12÷
5 8+
3 8),
=
÷(
2 3+
3 8),
=
÷
25 24,
=
;
(4)1.25×38+125%×3-5÷4,
=1.25×38+1.25×3-1.25,
=1.25×(38+3-1),
=1.25×40,
=50.
脱式计算(能简算的要简算) ( 4 5 + 1 4 )÷ 7 3 + 7 1

(1)( 4 5 + 1 4
)÷
7 3+
7 10,
=
÷
7 3+
7 10,
=
+
14 20,
=
;
(2)
5 19×
1 4+
13 19×
1 4,
=(
+
13 19)×
1 4,
=
×
1 4,
=
;
(3)7.6×35%+6.5×0.76,
=7.6×0.35+0.65×7.6,
=7.6×(0.35+0.65),
=7.6×1,
=7.6;
(4)
13 49×21+13×
28 49,
=
×13+13×
28 49,
=(
+
28 49)×13,
=1×13,
=13.
脱式计算(能简算的要简算)(1) 6 7 ÷[( 4 7 - 1 2 )× 2 5 ]
(1) 6 7 ÷[( 4 7-
1 2)×
2 5]
=
÷[
1 14×
2 5]
=
÷
1 35=
6 7×35
=30;
(2)
14 15×25%-
11 15÷4
=
×
1 4-
11 15×
1 4=(
14 15-
11 15)×
1 4=
1 5×
1 4=
1 20;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37
=(1.28-0.28)×2.37
=1×2.37
=2.37;
(4)(
5 12+
1 19)×12+
7 19=
5 12×12+
1 19×12+
7 19=5+(
12 19+
7 19)
=5+1
=6.
脱式计算,能简算的要简算.(1)8.4× 1 10 +1.6÷10 (2) 3 7 ÷ 5 6
(1)8.4× 1 10 +1.6÷10=8.4× 1 10
+1.6×
1 10,
=(8.4+1.6)×
,
=10×
,
=1;
(2)
3 7÷
5 6+
4 7×
6 5=
3 7×
6 5+
4 7×
6 5,
=(
+
4 7)×
6 5,
=1×
,
=
.
(3)(
1 17+
1 4)×4+
3 17=
1 17×4+
1 4×4+
3 17,
=
+
3 17+1,
=1
;
(4)12.5-(8.5+0.625÷62.5%)
=12.5-(8.5+1),
=12.5-9.5,
=3.
脱式计算,能简算的要简算.15.8- 7 8 + 1 5 - 11 18 1 8
(1)15.8- 7 8 + 1 5-
11 18,
=15
-
7 8+
1 5-
11 18,
=(15
+
1 5)-(
7 8+
11 18),
=16-1
,
=14
;
(2)
1 8÷[(
1 2+
1 3)×
3 10],
=
÷[
5 6×
3 10],
=
÷
1 4,
=
;
(3)61
1 11÷12,
=61
×
1 12,
=(60+
)×
1 12,
=60×
+
12 11×
1 12,
=5+
,
=5
;
(4)2+20×(
1 4-
1 5),
=2+[20×
-20×
1 5],
=2+[5-4],
=2+1,
=3;
(5)4×0.28×2.5,
=(4×2.5)×0.28,
=10×0.28,
=2.8.
脱式计算,能简算的要简算. 5 6 -( 2 3 - 1 9 ) 1 2 +
(1) 5 6 -( 2 3-
1 9),
=
-
5 9,
=
;
(2)
1 2+
4 5-
3 10,
=
-
3 10,
=1;
(3)32-
7 15-
8 15,
=32-(
+
8 15),
=32-1,
=31;
(4)
9 10-
3 4+
1 10-
1 4,
=(
+
1 10)-(
3 4+
1 4),
=1-1,
=0.