知识大全 计算下面各题,能简便的用简便方法计算.①25×+75÷4②1÷27×2627③(25-13)÷56④4.32+310+0.68+710
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计算下面各题,能简便的用简便方法计算.①25×+75÷4②1÷27×2627③(25-13)÷56④4.32+310+0.68+710
①25×
1 |
4 |
+75÷4
=25×
1 |
4 |
+75×
1 |
4 |
,
=(25+75)×
1 |
4 |
,
=100×
1 |
4 |
,
=25;
②1÷
2 |
7 |
×
26 |
27 |
=1×
7 |
2 |
×
26 |
27 |
,
=
91 |
27 |
;
③(
2 |
5 |
-
1 |
3 |
)÷
5 |
6 |
=
1 |
15 |
×
6 |
5 |
,
=
2 |
25 |
;
④4.32+
3 |
10 |
+0.68+
7 |
10 |
=(4.32+0.68)+(
3 |
10 |
+
7 |
10 |
),
=5+1,
=6.
计算下面各题,能简便的用简便方法计算.25×36×4 135×99 2...
(1)25×36×4,
=25×4×36,
=100×36,
=3600;
(2)135×99,
=135×(100-1),
=135×100-135×1,
=13500-135,
=13365;
(3)203-135÷5,
=203-27,
=176;
(4)97-12×6+43,
=97-72+43,
=25+43,
=68;
(5)49×99+49,
=49×(99+1),
=49×100,
=4900;
(6)5620÷(562×5),
=5620÷562÷5,
=10÷5,
=2;
(7)37+125+63+175,
=(37+63)+(125+175),
=100+300,
=400;
(8)175+25÷25+15,
=175+1+15,
=176+15,
=191;
(9)125×32×25,
=125×(4×8)×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(10)156×l0l-156,
=156×(l00-1),
=156×100,
=15600.
计算下面各题,能简便的用简便方法计算.(841-41)÷25×4 83×29+71×83 &nbs...
(1)(841-41)÷25×4
=800÷25×4
=32×4
=128;
(2)83×29+71×83
=83×(29+71)
=86×100
=8500;
(3)101×99
=(100+1)×99
=100×99+1×99
=9900+99
=9999;
(4)199+199×99
=(199+1)×99
=200×99
=19800;
(5)560÷[490÷(34+36)]
=560÷[490÷70]
=560÷7
=80;
(6)28×37+73×37-37
=(28+73-1)×37
=100×37
=3700.
计算下面各题,能简便的要用简便方法计算.245-525÷25 ...
(1)245-525÷25
=245-21
=224;
(2)37×25×4
=37×(25×4)
=37×100
=3700;
(3)480÷60×122
=8×122
=976;
(4)138+44+62
=138+62+44
=200+44
=244;
(5)22×(23+27)
=22×50
=1100;
(6)125×16
=125×(8×2)
=125×8×2
=1000×2
=2000.
计算下面各题,能简便的用简便方法计算 (241-41)÷25×4 83×29+71×83 199+199×99 560
(1)(241-41)÷25×4,
=200÷25×4,
=8×4,
=32;
(2)83×29+71×83,
=83×(29+71),
=83×100,
=8300;
(3)199+199×99,
=199×(1+99),
=199×100,
=19900;
(4)560÷[490÷(34+36)],
=560÷[490÷70],
=560÷7,
=80;
(5)101×99,
=(100+1)×99,
=100×99+1×99,
=9900+99,
=9999;
(6)208×37-8×37,
=(208-8)×37,
=200×37,
=7400.
计算下面各题,能简便的用简便方法计算. 600÷25÷4 83×29+71×83 199+199×99 560÷[490
(1)600÷25÷4, =600÷(25×4), =600÷100, =6;(2)83×29+71×83, =83×(29+71), =83×100, =8300; (3)199+199×99, (4)560÷[490÷(34+36)], (5)101×99, (6)28×37+73×37-37, |
计算下面各题.(能简便的用简便方法计算) 6 5 × 2 15 + 2 15
(1)
+
÷
,
×
+
×
,
×(
+
),
×
,
; (2)
×(
-
×
),
×(
-
),
×
,
; (3)
×11-
,
×(11-1),
×10, |
用简便的方法计算下面各题.25×125×4 &n...
(1)25×125×4,
=125×(25×4),
=125×100,
=12500;
(2)25×(4+2),
=25×4+25×2,
=100+50,
=150;
(3)124×25-25×24,
=(124-24)×25,
=100×25,
=2500;
(4)25×24,
=(25×4)×6,
=100×6,
=600.
计算下面各题,能简便的要用简便方法计算21÷(13+25)÷911920÷[12×(45+25)]5.65-6.29+5.35-2.713.7×99
(1)21÷(
1 |
3 |
+
2 |
5 |
)÷
9 |
11 |
=21÷
11 |
15 |
÷
9 |
11 |
=21÷(
11 |
15 |
×
9 |
11 |
)
=21÷
3 |
5 |
=35;
(2)
9 |
20 |
÷[
1 |
2 |
×(
4 |
5 |
+
2 |
5 |
)]
=
9 |
20 |
÷[
1 |
2 |
×
6 |
5 |
]
=
9 |
20 |
÷
3 |
5 |
=
3 |
4 |
;
(3)5.65-6.29+5.35-2.71
=(5.65+5.35)-(6.29+2.71)
=11-9
=2;
(4)3.7×99+3.7
=3.7×(99+1)
=3.7×100
=370.
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