Inspired Math CISCE Class 7th ex 1.1 q4 to q6

Описание: Inspired Math CISCE Class 7th ex 1.1 q4 to q6
4) State the sign of the products,without actually multiplying.
a) (-2)×(-3)×(-4)×(-5)
b) (-6)×(-5)×(-8)×(-9)×0
c) (-1)×(-2)×(-1)×9
d)12×7×(-6)×7
e)(10)×(-9)×(-8)×4
5) State the sign of the product if a,b,c,d,e,f,g and h are positive integers.
a) (-a)×(-b)×c×(-d)×(-e)×f×g×(-h)
b) a×b×c×(-d)×(-e)×(-f)
c) 18 negative integers×3 positive integers
d) 31 negative integers×2 positive integers
e) 28 positive integers× 14 negative integers
6) Fill in the empty boxes with , or = sign
a)6+3×11_(6+3)×11
b) 6-3×11_(6-3)×11
c)(-6)×(-5)-2_(-6)×(-5-2)
d) 7×(-3)_(-3)×7
e)11×2+3_3×2+11
f) 4×[-3+(-5)]_4×(-3)+4×(-5)