Q.1.
Increase 450 by 230.
Q.2.
Decrease 2.5 by 1.8.
Q.3.
What is the best method of adding 0.9?
Q.4.
Which of these pairs would not make a whole number?
Q.5.
What is the best method of adding 34 + 48 + 56?
Q.6.
Which of these number sentences is incorrect?
Q.7.
How many altogether are 258 and 162?
Q.8.
Which strategy would be best to subtract 2.9?
Q.9.
What is the difference between 6.3 and 2.4?
Q.10.
Which strategy would be best to add 69 + 61 + 65 + 67?