Grade 1 study

What is a joining word problem?

In a joining (or 'add to') problem, someone starts with an amount and gets more. You add the two amounts together to find the total.

What is a separating word problem?

In a separating (or 'take from') problem, you start with a total and some are removed or leave.. Starts with some, some leave: subtract. 10 grapes, eat 4, 6 left.

Is this true? It is not true that Comparison problems put two amounts side by side.

No. Comparison problems put two amounts side by side. You find the difference by subtracting the smaller amount from the larger one.

What is a part-part-whole problem?

A whole can be made of two parts. If you know both parts, add to find the whole. If you know the whole and one part, subtract to find the other part.

How do you find a missing number in an equation?

A missing number (unknown) can appear anywhere in an equation.. ? + 4 = 9. Think 9 take away 4. The missing number is 5.

Is this true? A number sentence uses numbers and signs like + − = to show a story.

Yes. Underline the numbers. Circle words like in all or left. Then write + or −.

Match each prompt to its fact.

What is a joining word problem? → In a joining (or 'add to') problem, someone starts with an amount and gets more.; What is a separating word problem? → In a separating (or 'take from') problem, you start with a total and some are removed or leave.; What is a comparison word problem? → Comparison problems put two amounts side by side.; What is a part-part-whole problem? → A whole can be made of two parts.

Put these ideas in lesson order.

join problem → separate problem → compare problem → part-part-whole