1樓:手機使用者
(1)12.75-5
17+11
4-1217,
=(12.75+11
4)-(5
17+12
17),
=14-1,
=13;
(2)[1-(1
5+0.3)]÷18,
=[1-0.5]÷18,
=0.5÷18,
=4;(3)2
9×40%+79÷5
2,=(29+79
)×40%,
=1×40%,
=0.4;
(4)1.25×3.2×2.5,
=(1.25×8)×(0.4×2.5),
=10×1,
=10.
脫式計算(能簡算要簡算)?
2樓:妙酒
3.76+4.25+5.75 +12-
3.27-0.73+ 60.
49-36+5.51,『=(4.25+5.
75)+12-(3.27+0.73)-36+(60.
49+5.51)+3.76
=10+12-4-36+66+3.76
=51.76
3樓:老任
解:1 . 3.76+4.25+5.75
=3.76+(4.25+5.75)
=3.76+10
=13.76
2. 12-3.27-0.73
=12-(3.27+0.73)
=12-4
=83. 60.49-36+5.51
=(60.49+5.51)-36
=66-36=30
4樓:原宇衛香旋
(54+9/13)÷9
36÷【
(5/6-1/3)×3】
5/7+8/7÷2
2-6/13÷9/2-2/3
=(54+9/13)×1/9
=36÷2/3
=5/7+4/7
=2-4/39-2/3
=54×1/9+9/13×1/9
=54=9/7
=2-(4/39+2/3)
=6+1/13
=48/39=16/13
=79/13或6
1/13
【3/5-(2/4-2/5)】÷4
=【3/5-1/10】÷4
=1/2÷4
=1/8
希望我答
幫助純手打辛苦~
脫式計算.(能簡算的要簡算) 0.125×0.25×8×4 [5-1.7÷(2-1)]×1 87×386 49÷(79+49)×114
5樓:手機使用者
(1)0.125×
源0.25×8×4,
=(0.125×8)×(0.25×4),
=1×1,
=1;(2)[5-1.7÷(2-1)]×1,=[5-1.7÷1]×1,
=[5-1.7]×1,
=3.3×1,
=3.3;
(3)87×386,
=(86+1)×386,
=86×3
86+1×386,
=3+386,
=3386
;(4)4
9÷(79+4
9)×114,
=49÷119
×114,=4
11×114,
=1;(5)3.9÷1.5-2.3×0.5,=2.6-1.15,
=1.45;
(6)112÷3
4-58×1635,
=2-27,
=157.
脫式計算.(能簡算的要簡算)①1÷0.25+0.25÷1-2.5×0.1②1+2+3+4+5+6+5+4+3+2+16666662③22×4+24×6+
6樓:度鍍
①1÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,
=4+(0.25-0.25),
=4+0,
=4;②1+2+3+4+5+6+5+4+3+2+16666662
,=36
6666662
,=18×2
3333331×2
,=18
3333331;③2
2×4+2
4×6+2
6×8+2
8×10
+210×12,=1
2-14+1
4-16+1
6-18+1
8-110+1
10-112,
=12-112,=5
12;④1÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,
=100-99000,
=-98900.
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