IT’S TIME FOR… SUBTRACTION PRACTICE ! JACOB M. LIGHTBODY © 2016 LESSON #2: INTERMEDIATE LEVEL EXERCISES

D IRECTIONS: T RY TO SOLVE THE FOLLOWING PROBLEMS USING MENTAL MATH. C LICK ON YOUR ANSWER CHOICES ONCE YOU’VE MADE UP YOUR MIND.

_____ _____ 1.) U SE MENTAL MATH TO FIND THE ANSWER A.) 16 - B.) 17 C.) 18 D.) 19

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 2.) U SE MENTAL MATH TO FIND THE ANSWER A.) 15 - B.) 16 C.) 17 D.) 18

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 3.) U SE MENTAL MATH TO FIND THE ANSWER A.) 9 - B.) 12 C.) 15 D.) 17

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 4.) U SE MENTAL MATH TO FIND THE ANSWER A.) 31 - B.) 29 C.) 32 D.) 28

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 5.) U SE MENTAL MATH TO FIND THE ANSWER A.) 42 - B.) 38 C.) 37 D.) 35

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 6.) U SE MENTAL MATH TO FIND THE ANSWER A.) 26 - B.) 25 C.) 21 D.) 18

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 7.) U SE MENTAL MATH TO FIND THE ANSWER A.) 19 - B.) 17 C.) 15 D.) 14

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 8.) U SE MENTAL MATH TO FIND THE ANSWER A.) 23 - B.) 9 C.) 14 D.) 18

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 9.) U SE MENTAL MATH TO FIND THE ANSWER A.) 58 - B.) 62 C.) 49 D.) 54

G O B ACK! G O F ORWARD!

G O F ORWARD!

_____ _____ 10.) U SE MENTAL MATH TO FIND THE ANSWER A.) 9 - B.) 13 C.) 11 D.) 7

G O B ACK! G O F ORWARD!

G O F ORWARD!