Question

Let's investigate and apply tricky ways of addition and subtraction. Then complete the sums as quickly as possible.

a) 26 + 15 =
b) 34 + 42 =
c) (30 + 25) - 3 =
d) 32 + 45 =
e) 52 + 43 =
f) 25 - 13 =
g) 47 - 24 =
h) 59 - 35 =

Answer 1

To solve these addition and subtraction problems quickly, follow the given rules and apply the correct strategies for each problem.

Step-by-step explanation:

To solve these addition and subtraction problems quickly, we can apply different strategies based on the given rules. Let's go through each problem step by step:

a) 26 + 15 = 41. Both numbers are positive, so we add them together.

b) 34 + 42 = 76. Both numbers are positive, so we add them together.

c) (30 + 25) - 3 = 52. First, we add 30 and 25 to get 55, then subtract 3 from 55.

d) 32 + 45 = 77. Both numbers are positive, so we add them together.

e) 52 + 43 = 95. Both numbers are positive, so we add them together.

f) 25 - 13 = 12. Subtract 13 from 25.

g) 47 - 24 = 23. Subtract 24 from 47.

h) 59 - 35 = 24. Subtract 35 from 59.