3.1 Multiplying and dividing decimals mentally Grade 8

3.1 Multiplying and dividing decimals mentally Grade 8

WALT 

*Calculate  with decimals mentally, using jottings where appropriate.

Multiple Choice

Work this out mentally.

 $5\times0.5$  

• 0.25

• 2.5

• 25

• 0.025

Multiple Choice

Work this out mentally.

 $1.2\times3$  

• 0.036

• 0.36

• 36

• 3.6

Multiple Choice

Work this out mentally.

 $0.7\times0.4$  

• 0.28

• 2.8

• 0.028

• 28

Multiple Choice

Work this out mentally.

 $0.03\times1.5$  

• 450

• 4.5

• 0.045

• 0.45

Multiple Choice

Work this out mentally.

 $18\div0.3$  

• 6

• 60

• 600

• 0.06

Multiple Choice

Work this out mentally.

 $35\div0.05$  

• 0.7

• 7

• 70

• 700

Multiple Choice

Work this out mentally.

 $5.6\div0.7$  

• 0.8

• 8

• 0.08

• 800

Multiple Choice

Work this out mentally.

 $44\div0.11$  

• 0.4

• 4

• 400

• 40

Open Ended

Work this out mentally.

 $4\times0.3$  

Open Ended

Work this out mentally.

 $5\times0.8$  

Open Ended

Work this out mentally.

 $0.7\times0.3$  

Open Ended

Work this out mentally.

 $13\times0.2$  

Open Ended

Work this out mentally.

 $0.02\times70$  

Open Ended

Work this out mentally.

 $0.05\times11.1$  

Open Ended

Work this out mentally.

 $6\div0.3$  

Open Ended

Work this out mentally.

 $8\div0.2$  

Open Ended

Work this out mentally.

 $18\div0.6$  

Open Ended

Work this out mentally.

 $28\div0.7$  

Open Ended

Work this out mentally.

 $5\div0.02$  

Open Ended

Work this out mentally.

 $30\div0.01$  

Open Ended

Work this out mentally.

 $36\div0.18$  

Open Ended

Work this out mentally.

 $0.25\div0.05$  

Open Ended

Work this out mentally.

 $2.7\div0.3$