Scholar 6_Rounding and mental math

What is the value of 162 +1620 + 6201+ 2016 ?

• 9639

• 9819

• 9999

• 10089

Which of the following five expression is correct?

• 1.2×3.4 =12×3.4

• 0.98×0.99 > 0.99

• 10.4×0.1<1.04

• 1.1×1.1>1.1

Find the value of 25 x 44 x 18

• 19800

• 18900

• 18800

• 1980

Find the value of 33 x 15 + 44 x 12 + 77.

• 1000

• 1100

• 1200

• 1300

Which of the following expression is incorrect?

• 29 + 92 = (2 + 9)x(9 + 2)

• 36 + 63 = (3 + 6)x(6 + 3)

• 56 + 65 = (5 + 6)x(6 + 5)

• 47 + 74 = (4 + 7)x(7 + 4)

Find the unit digit of A given that A= 1x2x3x...x17x18x19

• 9

• 0

• 1

• 4