#### Number of problems found: 85 5 triangles + 1 square = how many sides in all Why does 1 3/4 + 2 9/10 equal 4.65? How do you solve this? Add and write the result again as hours, minutes, seconds: 2hodiny45min15s + 1h20m50s = Add this two mixed numbers: 1 5/6 + 2 2/11= At a weather centre, the temperature at midnight was -2 degree Celsius and by noon it had raised 4 degree Celsius. What is the new temperature? Fill letters instead of digits so the indicated sum (equal letters represent equal digits). What number is hidden under the letter J? A A H A H O A H O J -------------------------- 4 3 2 1
• Expression 1 What is 7+8-(5×2)+5-4+(6×(5-3)+6)-(8+10)-7+6?
• Evaluate expression If x=2, y=-5 and z=3 what is the value of x-2y
• Televisions Television is the fifth most expensive and tenth cheapest TV. How many different TVs are in stores?
• Operations Sum of the numbers 1.01 and 3.35 multiply by the difference of numbers 6.69 and 1.39.
• Multiples What is the sum of the multiples of number 7 that are greater than 30 but less than 56?
• Decimal expansion Calculate: 2 . 1 + 0 . 10 + 7 . 10000 + 4 . 1000 + 6 . 100 + 0 . 100000 =
• Expression 8 Evaluate this expressions: a) 5[3 + 4(2.8 - 3)] b) 5×(8-4)÷4-2
• Parenthesis Fill in the examples correctly brackets: A) 7.9+12:3-2 =23 B) 7.9+12:3-2=75
• Expression plus minus Evaluate expression: (-1)2 . 12 – 6 : 3 + (-3) . (-2) + 22 – (-3) . 2
• Brother and sister When I was 8, my sister was 4, and now I am 18. How old is my sister? Add two mixed fractions: 2 4/6 + 1 3/6
• Expression 6 Evaluate expression: -6-2(4-8)-9
• Roses and tulips At the florist are 50 tulips and 5 times less roses. How many flowers are in flower shop?
• With bracket Calculate (evaluate) simple mathematical expression with a negative numbers and a bracket: 13+15*5-2*(-6)

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