1樓:凌月霜丶
0.25×5×1.6 4.
28+4.72×2.5 3.
14×5.5+0.314×45 19.
72×101-19.72 3.7×4.
85+16.07 (0.718+0.
718+0.718+0.718)×0.
25.(1)0.25×5×1.6
=0.25×5×4×0.4
=(0.25×4)×(5×0.4)
=1×2
=2;(2)4.28+4.72×2.5
=4.28+1.18×4×2.5
=4.28+1.18×(4×2.5)
=4.28+1.18×10
=4.28+11.8
=16.08;
(3)3.14×5.5+0.314×45
=3.14×5.5+3.14×4.5
=3.14×(5.5+4.5)
=3.14×10
=31.4;
(4)19.72×101-19.72
=19.72×(101-1)
=19.72×100
=1972;
(5)3.7×4.85+16.07
=17.945+16.07
=34.015;
(6)(0.718+0.718+0.718+0.718)×0.25=(0.718×4)×0.25
=0.718×(4×0.25)
=0.718×1
=0.718.
遞等式計算,能簡便的要簡便
2樓:★魯魯修
(1)25×32×0.25
=25×4×2×4×0.25
=(25×4)×(4×0.25)×2
=100×1×2
=200;
(2)0.25×(0.4+40)
=0.25×0.4+40×0.25
=0.1+10
=10.1;
(3)0.67+1.28+9.33+0.72=(0.67+9.33)+(1.28+0.72)=10+2
=12;
(4)3.18-(0.33+1.18)
=3.18-0.33-1.18
=(3.18-1.18)-0.33
=2-0.33
=1.67;
(5)6.3÷35
=6.3÷(7×5)
=(6.3÷7)÷5
=0.9÷5
=0.18;
(6)[1-(0.5-0.25)]×0.6=[1-0.25]×0.6
=0.75×0.6
=0.45;
(7)7.8×0.9+0.78
=0.78×9+0.78
=0.78×(9+1)
=0.78×10
=7.8;
(8)1.9-1.9×(1.9-1.9)
=1.9-1.9×0
=1.9-0
=1.9.
數學遞等式計算(怎麼簡便怎麼算)
3樓:數學新綠洲
①101×7.8
=(100+1)×7.8
=100×7.8+1×7.8
=780+7.8
=787.8
②六分之五+5.2+六分之一+5.2
=六分之五+六分之一+5.2+5.2
=1+10.4
=11.4
③1.9×32×125×0.25
=1.9×8×125×4×0.25
=1.9×1000×1
=1900
④8.6×三分之二+8.6÷3
=8.6×三分之二+8.6× 3分之1
=8.6×(3分之2+ 3分之1)
=8.6
⑤2.74÷十四分之五+7.26×2.8
=2.74× 5分之14 +7.26× 5分之14=(2.74 +7.26)× 5分之14
=10× 5分之14=28
4樓:天才
①101×7.8=(100+1)×7.8=780+7.8=787.8
②5/6+5.2+1/6+5.2 =(5/6+1/6)+5.2×2=11.4
③1.9×32×125×0.25 =1.9 ×125×(32×0.25)=1.9×(125×8)=1.9×1000=1900
④8.6×2/3+8.6÷3=8.6×2/3+8.6×1/3=8.6×(2/3+1/3)=8.6
⑤2.74÷5/14+7.26×2.8=2.74×2.8+7.26×2.8=(2.74+7.26)×2.8=28
希望樓主採納·~~~
用遞等式計算(怎樣簡便就怎樣計算). 5.4+[8×(6.34-3.59)]0.95×10.1 10.48+
5樓:祐喌炭
(1)5.4+[8×(6.34-3.59)]=5.4+[8×2.75]
=5.4+22
=27.4;
(2)0.95×10.1
=0.95×(10+0.1)
=0.95×10+0.95×0.1
=9.5+0.095
=9.595;
(3)10.48+22.56÷4.7×5.4=10.48+4.8×5.4
=10.48+25.92
=36.4;
(4)4.6÷(0.23×2.5)
=4.6÷0.575=8.
用遞等式計算,怎樣算簡便就怎樣算:①8.4×0.2
6樓:愛_上癮
8.4*0.2
=(84÷10)*(2÷10)
=84*2÷10÷10
=168÷10÷10
=1.68
用遞等式計算,怎樣簡便就怎樣算(1)3 7 2 2 7 3 7 8(2)375 450 18 25(3)
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用遞等式計算,能簡便的要簡便計算
1 200 5.2 du30 200 156 44 zhi2 3.8 dao3.5 6.2 3.5 3.8 6.2 內3.5 10 3.5 35 3 9 101 9 100 1 9 100 9 900 9 909 4 4.536 容0.8 14 5.67 14 0.405 用遞等式計算,能簡便的要簡...
用遞等式計算。(能簡便計算的用簡便方法計算)2 5(3 8 0 4)
2.5 3.8 0.4 4.6 0.33 5.4 0.33 3.8 2.5 0.4 0.33 4.6 5.4 3.8 1 0.33 10 3.8 3.3 0.25 39 0.25 8.36 2.48 3.52 0.25 39 1 8.36 2.48 3.52 0.25 40 8.36 6 10 2....