Add 2-digit with 1-digit numbers.WP

In total

• Tổng

• Cộng

• Trừ

Plus

• Tổng

• Cộng

• Trừ

In total =

• Plus

• The sum of

• Minus

Work out (work out the sum of: tính tổng)

• Cộng

• Tính toán

• Phép cộng

How many (How many apples do they have in total: họ có tổng bao nhiêu táo)

• Cộng

• Tính toán

• Có bao nhiêu

Ann has 10 pens. Bill has 10 pens.

How many pens do they have in total?/Work out the sum of pens they have.

..................................(pens)

• 10 + 10 = 20 (pens)

• 10 - 10 = 0 (pens)

Ann has 20 pens. Min has 10 pens.

How many pens do they have in total?/Work out the sum of pens they have.

..................................(pens)

• 20 - 10 = 10 (pens)

• 20 + 10 = 30 (pens)

Ann has 15 pens. Bill has 3 pens.

How many pens do they have in total?/Work out the sum of pens they have.

..................................(pens)

• 15 - 5 = 10 (pens)

• 15 + 3 = 18 (pens)

Lin has 17 pens. Bill has 2 pens.

How many pens do they have in total?/Work out the sum of pens they have.

..................................(pens)

• 17 + 2 = 19 (pens)

• 17 - 2 = 15 (pens)

Lin has 26 pens. Bill has 3 pens.

How many pens do they have in total?/Work out the sum of pens they have.

..................................(pens)

• 26 + 3 = 29 (pens)

• 26 - 3 = 23 (pens)