NZ Level 3
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Checking reasonableness of calculations

Interactive practice questions

Is $4000$4000 a reasonable estimate for $42\times8$42×8?

Yes

A

No

B

Yes

A

No

B
Easy
Less than a minute
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Is $400$400 a reasonable estimate for $2002\div5$2002÷​5?

Irene had $120$120 dolls and she gave $18$18 to her friend Charlie. Charlie said that Irene had $138$138 dolls left. Is Charlie's statement reasonable?

Maximilian thinks $3.5$3.5 kg of apples will cost about $\$9.25$$9.25. Is this a reasonable estimate?

Outcomes

NA3-1

Use a range of additive and simple multiplicative strategies with whole numbers, fractions, decimals, and percentages.

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