Equations and Mental Math

1. y-8=4 What number minus 8 is 4? 2. 10x=90 10 times a number is 90. 3. n÷4=7 What number divided by 4 is 7? 4. y+2=2 What number plus 2 equals 2? X= y= n= y= Solve the equation using mental math. 5. x + 10 = 24 x= 6. 13n = 13 n= 7. 35y = 0 y= 8. y - 6 = 11 y= Tell whether 5 is a solution to each equation. Write yes or no in blank. 9. t+2=7 10. 16 - k = 11 11. 15 ÷ m = 5 12. 4y=20 13. You are saving money to buy a phone that costs $195. So far, you have saved $87. If you save $9 per week from this point, how many weeks will it take to have exactly $195? 14. You make $7/hour babysitting. You need to earn $420. How many hours do you need to babysit to earn $420? 15. You know that 717 adults and 489 children went to the fair. Estimate to the nearest hundred the total number of people that went to the fair. No comma in answer. |

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