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WorksheetsLIGHTNING Algebraic Multiplication
Total questions: 53
Worksheet time: 9mins
Round 1. Square the number as fast as you can! (5 seconds: 1 point)
Ready (click answers faster for points!)
Not Ready (I wanna lose points)
10²
50
100
20
90
110
100²
200
2²
20²
4²
40²
1600
1500
1400
1700
1800
6²
60²
9²
90²
7²
70²
700²
490,000
4,900,000
49,000
70,000
7,000
Round 2. Square the number ending in 5 as fast as you can! (5 seconds: 1 point)
Ready !(-_-)!
Not Ready (What is 5 * 5 again?)
5²
PRIMER: What is 2⋅3 ?
252
PRIMER: What's 7⋅8 ?
75²
PRIMER: What's 1⋅2 ?
15²
PRIMER: What's 3⋅4 ?
35²
45²
65²
85²
55²
95²
Round 3. Square the number as fast as you can! (2 points, 10 Seconds)
(PRIMERs: 1 point, 5 seconds)
Ready (I've had a minute to get ready)
Not Ready (I need a minute to remember my times tables)
PRIMER: What's 10⋅11 ?
105²
1050
10505
15025
11025
13025
PRIMER: What's 20⋅21 ? (Hint: do 20², then + 20)
205²
PRIMER: What's 30⋅31 ? (Hint: 30²+30)
305²
PRIMER: What's 0.1⋅0.1 ?
0.2
4.5²
PRIMER: What's 60⋅61 ? (Hint: 60²+60)
60.5²
PRIMER: What's 8.0⋅8.1 ? (Hint 80²+80, then move the decimal)
648.0
6.480
8.05²
66.6025
64.8025
90.5²
125²
155²
ROUND 4: Multiply these similar numbers (3 points, 20 seconds)
READY!! \°_°/
Not ready! (What's a "similar number"?)
If 5² = 25, what's 4⋅6 ?
if 95² = 9025, what's 94⋅96 ?
If 125² = 15625, what's 124⋅126
15636
If 35² = 1225, what's 33⋅37 ? Hint: (35-2)(35+2) = 35² - 2²
If 12² = 144, what's 119⋅121 ?
ROUND 5.
FINAL ROUND!
ONE QUESTION!
20 points!
READY! `[$_$]'
Not Ready
21⋅32⋅43⋅54⋅65⋅76⋅87⋅98⋅109⋅1110
NO CALCULATOR!
0.12345678910
0.0909090909...
0.999999999...
0.00900900900...
0.9876543210...
