Question

Simplify the following: a) [ -6 +22 – 6 + 8 ] ÷ ( -9 ) b) 400 ÷ { 40 – (-2) -3 – ( -1)} c) 40 x -23 + 40 x -17 d) 1673 x 99 – (-1673) e) 490 x 98

Answer 1

Answer:

1. (-12+30) /-9

18/-9

-2

2. 400/ (40+2-3+1)

400/ (43-3)

400/40

10

3. 40 (-23+(-17))

40 (-23-17)

40x 40

160

4. 1673 x99 + 1673

167300

5. 490x98

48020

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Answer 2

Step-by-step explanation:

a) [-6+22-6+8]÷(-9) =[16+2]÷(-9)=18÷(-9)=-2.

b)400÷{40-(-2)-3-(-1)}=400÷{42-2}=400÷40=10.

c)40(-20)+40(-17)=-800+(-680)=-800-680=-1480.

d)1673(99)-(-1673)=1673(99)+1673(1)=1673[90+1]

=1673(100)=167300.

e)490(98)=48020.