四年级递等式计算150道速度因为是暑假作业~要有答案啊~~~
四年级递等式计算150道速度因为是暑假作业~
要有答案啊~~~
四年级递等式计算150道速度因为是暑假作业~要有答案啊~~~
四年级递等式计算150道速度因为是暑假作业~
要有答案啊~~~
(720+270)÷55-120÷24
=990÷55-120÷(12×2)
=990÷110×2-120÷12÷2
=9×2-10÷2
=18-5
=13
(63+480÷16)-29
=(63+30×16÷16)-29
=63+30-30+1
=64
13.67-2.97+25.8
=13.67-3+0.03+25.8
=10.67+0.03+25.8
=10.7+25.8
=36.5
7.06-2.78+13.78
=7.06+13.78-2.78
=7.06-(13.78-2.78)
=7.06+11
=18.06
0.64×25×7.8+2.2
=0.16*4*25*7.8+2.2
=0.16*100*7.8+2.2
=16*7.8+2.2
=127
2÷2.5+2.5÷2
=4/5+5/4
=2.05
194-64.8÷1.8×0.9
=194-36*0.9
=194-32.4
=161.6
36.72÷4.25×9.9
=8.64*9.9
=85.536
5180-705×6
=5180-4230
=950
24÷2.4-2.5×0.8
=10-2
=8
(4121+2389)÷7
=6510/7
=930
671×15-974
=10065-974
=9091
469×12+1492
=5628+1492
=7120
405×(3213-3189)
=405*24
=9720
1)、0.36x1.5x0.4=0.4x5x0.36x0.3=2x0.108=0.216
2)、0.05x3.2x40=0.05x40x3.2=2x3.2=6.4
3)、3.78x0.5-0.65=3.78x0.5-1.3x0.5=(3.78-1.3)x0.5=2.48x0.5=1.24
4)、13.4x0.24+3.98=13.4x0.6x0.4+3.98=8.04x0.4+3.98=3.216+3.98=7.196
5)、3.8x41-3.8=3.8x(41-1)=3.8x40=152
6)、0.3x2.5x0.4=0.3x1=0.3
7)、0.78x101=0.78x100+0.78x1=78+0.78=78.78
8)、1.2x2.5+0.8x2.5=(1.2+0.8)x2.5=2x2.5=5
9)、9.8x25=10x25-0.2x25=250-5=245
10)、0.8x630x0.125=0.8x0.125x630=0.1x630=63
11)、198x0.51=200x0.51-2x0.51=102-1.02=100.98
12)、2.5x3.7+6.3x2.5=(3.7+6.3)x2.5=10x2.5=25
(45-17)+(9-3)=28+6=34,
(45-17)+(9-6)=28+3=31,
(45-18)+(9-3)=27+6=33
(45-18)+(9-6)=27+3=30,
(45-27)+(9-3)=18+6=24,
(45-27)+(9-6)=18+3=21
(45-28)+(9-3)=17+6=23,
(45-28)+(9-6)=17+3=20,
(46-17)+(8-3)=29+5=34
(46-17)+(8-5)=29+3=32,
(46-19)+(8-3)=27+5=32,
(46-19)+(8-5)=27+3=30
(46-27)+(8-3)=19+5=24,
(46-27)+(8-5)=19+3=22,
(46-29)+(8-3)=17+5=22
(46-29)+(8-5)=17+3=20,
(54-16)+(9-2)=38+7=45,
(54-16)+(9-7)=38+2=40
(54-18)+(9-2)=36+7=43,
(54-18)+(9-7)=36+2=38,
(54-36)+(9-2)=18+7=25
(54-36)+(9-7)=18+2=20,
(54-38)+(9-2)=16+7=23,
(54-38)+(9-7)=16+2=18
(57-18)+(6-2)=39+4=43,
(57-18)+(6-4)=39+2=41,
(57-19)+(6-2)=38+4=42
(57-19)+(6-4)=38+2=40,
(57-38)+(6-2)=19+4=23,
(57-38)+(6-4)=19+2=21
(57-39)+(6-2)=18+4=22,
(57-39)+(6-4)=18+2=20,
(63-15)+(9-2)=48+7=55
(63-15)+(9-7)=48+2=50,
(63-18)+(9-2)=45+7=52,
(63-18)+(9-7)=45+2=47
(63-45)+(9-2)=18+7=25,
(63-45)+(9-7)=18+2=20,
(63-48)+(9-2)=15+7=22
(63-48)+(9-7)=15+2=17,
(64-25)+(8-1)=39