\(=90\times7+7\times0+7\)

= 7 x (90 + 9 + 1)

= 7 x 100

= 700

(36+54) x 7 + 7 x 9 +7
=7 x (36+54+9+1)
=7 x 100
=700

= (36+54 +1 +9) x 7 
 = 7 x 100 
= 700

(36 + 54) x 7 + 7 x 9 + 7

= 90 x 7 + 7 x 9 + 7

= (90 + 9 + 1 ) x 7

= 100 x 7

= 700

(36 + 54) x 7 + 7 x 9 + 7

= 90 x 7 + 7 x 9 + 7

= (90 + 9 + 1 ) x 7

= 100 x 7

= 700

( 36 + 54 ) x 7 + 7 x 9 + 7

= 100 x 7 + 63 + 7

= 700 + 70

= 770

700

tk nha

( 36 + 54 ) x 7 + 7 x 9 + 7

= ( 36 + 54 + 9 + 1 ) x 7

= 100 x 7

= 700

 ( 36 + 54 ) x 7 + 7 x 9 + 7 = 90 x 7 + 7 x 9 + 7 x 1 

                                       = ( 90 + 9 + 1 ) x 7

                                       = 100 x 7

                                      = 700

( 36 + 54 ) x 7 + 7  x 9 + 7

= 90 x 7 + 7 x 9 + 7

= 7 x ( 90 + 9 +1 )

= 7x 100

= 700

( 36 + 54 ) x 7 + 7 x 9 + 7

= 90 x 7 + 7 x 9 + 7

= 630 + 63 + 7

= 200

a)7.(90+9+1)

=7.100

=700

b)3/4.(3/9+2/3)

=3/4.1

=3/4

a) ( 36 + 54 ) x 7 + 7 x 9 + 7

= ( 36 + 54 + 9 + 1 ) x 7

= 100 x 7

= 700

b) \(\frac{3}{4}\times\frac{3}{9}+\frac{3}{4}\times\frac{2}{3}\)

\(=\left(\frac{3}{9}+\frac{2}{3}\right)\times\frac{3}{4}\)

\(=1\times\frac{3}{4}\)

\(=\frac{3}{4}\)

\(a,=100.7+7.9+7.1\)

\(=\left(100+9+1\right).7\)

\(=110.7\)

\(=770\)

\(b,=\frac{3}{4}.\left(\frac{3}{9}+\frac{2}{3}\right)\)

\(=\frac{3}{4}.1\)

\(=\frac{3}{4}\)

Dấu \(.\)là dấu nhân nha!!!

B

B

B

Học sinh nhẩm và ghi:

6 x 6 = 36

6 x 9 = 54

6 x 7 = 42

6 x 8 = 48

36 : 6 = 6

54 : 6 = 9

42 : 6 = 7

48 : 6 = 8