Question

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Answer 1

Answer:

9.) All Answers By Distribution-properties;;

a) (693+432)+412=693+(432+412)

L.H.S.=(693+432)+412

=1125+412=1537

R.H.S.=693+(432+412)

=693+844=1537

b) (1112+603)+444=1112+(603+444)

L.H.S.=(1112+603)+444

=1715+444=2159

R.H.S.=1112+(603+444)

=1112+1047=2159

c) (85×30)×4=85×(30×4)

L.H.S.=(85×30)×4

=2550×4=10200

R.H.S.=85×(30×4)

=85×120=10200

d) (63×5)×20=63×(5×20)

L.H.S.=(63×5)×20

=315×20=6300

R.H.S.=63×(5×20)

=63×100=6300

Step-by-step explanation:

10…

In class 6,,

The number of students in section A=49

" " " " " " B=38

" " " " " " C=51

Total number of students in class 6=

(49+38+51)=138

In class 7,,

The number of students in section A=51

" " " " " " B=49

" " " " " " C=38

Total number of students in class 7=

(51+49+38)=138

Total number of students in class 6 and 7=

(138+138)=276 ..Answer

11…

The number of students of each class in school=25

Total classes in school=40

Fees paid by each student =₹812

Total number of students in school=25×40

=1000

Total fees collection in a month by school=

1000×812=₹812000

Answer 2

Step-by-step explanation:

Q9.

a. (693+432)+412=693+(432+412)

1,125+412=693+844

1,537=1,537

b.(1,112+603)+444=1,112+(603+444)

1,715+444=1,112+1047

2,159=2,159

c.(85×30)×4=85×(30×4)

2,550×4=85×120

10,200=10,200

d.(63×5)×20=63×(5×20)

315×20=63×100

6300=6300

Q10. No.of students in class VI=A+B+C

=49+38+51

=138

No.of students in class VII=A+B+C

=51+49+38

=138 Total no.of students in class VI and VII

are:- VI+VII

=138+138

=276