Maths 3 - Lesson 3 - CIE 3.1 (3.9)

Put together 10s and 1s to make a 2-digit number.

• Compose

• Decompose

• Regroup

• Exchange

Split a number into tens and ones or hundreds and ones.

• Compose

• Decompose

• Exchange

• Regroup

put hundreds, tens and ones together in different ways, to support calculating.

• Compose

• Decompose

• Exchange

• Regroup

replacing one thing with another of the same value.

Ex: 10 ones = 10 = 1 tens

• Compose

• Decompose

• Regroup

• Exchange

Last Sunday, 174 children and 348 adults went to the cinema.

How many people went to the cinema last Sunday?

Mathematical Equivalence

ON

On Wednesday, 364 teachers and 257 students visited the museum.

How many people visited the museum on Wednesday?

Mathematical Equivalence

ON

A baker makes 278 strawberry cakes and 415 orange cakes.

How many cakes has the baker made?

Mathematical Equivalence

ON

The bookstore has 579 toy planes and 163 toy cars.

How many toys does the bookstore have?

Mathematical Equivalence

ON

A market stall has 458 watermelons left.

A box of 176 watermelons are delivered.

How many watermelons are on the stall now?

Mathematical Equivalence

ON

261 children and 319 adults visited the park today.

How many people visited the park today?

Mathematical Equivalence

ON