jacquieyolimar jacquieyolimar

05-04-2020
Mathematics

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Katie knew that 70 + 70 = 140. Explain how she can use this double to solve 70 + 80.

Respuesta :

05-04-2020

Answer:

you would just add 10 to 140

Answer Link

wegnerkolmp2741o wegnerkolmp2741o

05-04-2020

Answer:

see below

Step-by-step explanation:

70 + 70 = 140.

We know that 80 is 10 more than 70

the answer to 70+80 must be 10 more than the answer to 70+70 =140

so 140+10 = 150

Answer Link

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