10+10+10+10+10+20*5
105
10 + 10 + 10 . 4
20 + 20 + 30 + 30
105 = 100 000
10 + 10 + 10 . 4 = 60
20 + 20 + 30 + 30 = 100
10 mu 5 = 100000
10+10+10.4=60
20+20+30+30=100(phải không)
tính bằng cách thuận tiện
5 * 10/20 + 10/20 * 5 + 2 * 10/20
Bài làm
\(5x\frac{10}{20}+\frac{10}{20}x5+2x\frac{10}{20}\)
\(=\frac{10}{20}x\left(5+5+2\right)\)
\(=\frac{10}{20}x12\)
\(=\frac{12}{20}\)
\(=\frac{3}{5}\)
# Chúc bạn học tốt #
5*10/20+10/20*5+2*10/20
=(5+5)*10/20+2*10/20
=10*10/20+2*10/20
=5+1
=6
5 * 10/20 + 10/20 * 5 + 2 * 10/20=\(\frac{10}{20}\left(5+5+2\right)=\frac{10}{20}\cdot12=6\)
Complete 10 Times Table.
1 10 is 10 5 10 is ... 9 10 is ...
2 10 is 20 6 10 is ... 10 10 is ...
3 10 is 30 7 10 is ... 11 10 is ...
4 10 is 40. 8 10 is ... 12 10 is ...
Complete 10 Times Table.
1 10 is 10 5 10 is 50 9 10 is 90
2 10 is 20 6 10 is 60 10 10 is 100
3 10 is 30 7 10 is 70 11 10 is 110
4 10 is 40. 8 10 is 80 12 10 is 120
Tính (theo mẫu):
Mẫu: 5 x (10 – 4)
Cách 1:
5 x (10 – 4) = 5 x 6 = 30
Cách 2:
5 x (10 – 4) = 5 x 10 – 5 x 4 = 50 – 20 = 30
a) 3 x (20 – 5)
b) 20 x (40 – 1)
Hướng dẫn giải:
a) 3 x (20 – 5)
Cách 1:
3 x (20 – 5) = 3 x 15 = 45
Cách 2:
3 x (20 – 5) = 3 x 20 – 3 x 5 = 60 – 15 = 45
b) 20 x (40 – 1)
Cách 1:
20 x (40 – 1) = 20 x 39 = 780
Cách 2:
20 x (40 – 1) = 20 x 40 – 20 x 1 = 800 – 20 = 780
10+10+10+10+10+10+10+10+10+10+20+20+20+30+30=
10+10+10+10+10+10+10+10+10+10+20+20+20+30+30=?
ai mình tích lại nhà cả cab an
bằng
10x10+20x3+30x2
=100+60+60
=100+60x2
=100+120
=220
Tính:
20 + 10 + 10 = 60 - 10 - 20 =
30 + 10 + 20 = 60 - 20 -10 =
30 + 20 + 10 = 70 + 10 - 20 =
20 + 10 + 10 = 40 60 - 10 - 20 = 30
30 + 10 + 20 = 60 60 - 20 -10 = 30
30 + 20 + 10 = 60 70 + 10 - 20 = 60
20 + 10 + 10 =40 60 - 10 - 20 =30
30 + 10 + 20 =60 60 - 20 -10 =30
30 + 20 + 10 =60 70 + 10 - 20 =60
20 + 10 + 10 = 40 60 - 10 - 20 = 30
30 + 10 + 20 = 60 60 - 20 - 10 = 30
30 + 20 + 10 = 60 70 + 10 - 20 = 60
687 + ( 2 x 5 ) + 10 =
Mẫu
600 + ( 2 x 5 ) + 20 + 100 =
Thực hiện phép tính 2 x 5
2 x 5 = 2 + 2 + 2 + 2 + 2 = 10
2 x 5 = 10
600 + 10 + 20 + 100 = 730
`687 + (2 × 5) + 10`
`= 687 + 10 + 10`
`= 697 + 10`
`= 707`
20*4^5*9^10-4*3^21*8^10
------------------------------------------
10*2^10*6^20-2^31*27^7
Tính giá trị của biểu thức:
a) 90 – ( 30 – 20) = ..........................
= ..........................
90 – 30 – 20 = ..........................
= ..........................
b) 100 – (60 + 10) = ..........................
= ..........................
100 - 60 + 10 = ..........................
= ..........................
c) 135 – (30 + 5) = ..........................
= ..........................
135 – 30 – 5 = ..........................
= ..........................
d) 70 + (40 – 10) = ..........................
= ..........................
70 + 40 – 10 = ..........................
= ..........................
a) 90 – ( 30 – 20) = 90 – 10
= 80
90 – 30 – 20 = 60 - 20
= 40
b) 100 – (60 + 10) = 100 – 70
= 30
100 - 60 + 10 = 40 + 10
= 50
c) 135 – (30 + 5) = 135 – 35
= 100
135 – 30 – 5 = 105 – 5
= 100
d) 70 + (40 – 10) = 70 + 30
= 100
70 + 40 – 10 = 110 -10
= 100
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