Respuesta :

Answer:

Two-Step Addition

Two-Step Subtraction

Subtracting from 1,000

Doubling and Halving

Multiplying by Powers of 2

Multiplying by 9

Multiplying Even Numbers by 5

Multiplying Odd Numbers by 5

Squaring a Two-Digit Number that Ends with 1

these all can help you

Step-by-step explanation:

corispastries

Answer there is no trick you just have to know your math  as in time tables division addition and subtraction

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