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Level 4

Lesson 2

1 / 70

136

-5

10

-8

123

133

135

138

2 / 70

4.6

8

5.3

17.4

17.9

18.7

18.9

3 / 70

5.6

9

7.7

22.2

21.2

22.3

21.3

4 / 70

102 × 31

3,103

3,160

3,161

3,162

5 / 70

7²

9²

3²

119

129

139

149

6 / 70

155

-4

55

-8

199

198

197

196

7 / 70

12

6.7

-3

15.2

15.7

10.7

4.7

8 / 70

14

2.8

-4

13.8

13.4

12.8

12

9 / 70

12²

5²

7²

218

228

238

248

10 / 70

145

-4

56

-3

194

192

186

184

11 / 70

48 ÷ 8

5

6

7

8

12 / 70

24 ÷ 8

5

4

3

2

13 / 70

134

-4

56

-6

180

181

190

191

14 / 70

102 × 15

1,520

1,530

1,535

1,540

15 / 70

176

7

56

-7

232

233

223

213

16 / 70

102 × 14

1,482

1,428

1,442

1,439

17 / 70

8.1

5

8.3

21.9

21.4

20.9

20.4

18 / 70

17

5.2

-7

15

15.2

15.6

16.2

19 / 70

167

1

72

-6

234

235

236

239

20 / 70

13²

6²

4²

212

221

211

122

21 / 70

15²

8²

4²

315

310

305

300

22 / 70

3²

7²

11²

149

159

169

179

23 / 70

8.1

7

6.3

21.1

21.4

21.6

21.9

24 / 70

175

-8

72

-6

213

232

223

233

25 / 70

146

-2

89

-6

247

237

227

217

26 / 70

7.6

8

9.4

23.8

24.8

25

24

27 / 70

135

-8

55

-1

183

182

181

180

28 / 70

16 ÷ 8

4

3

2

1

29 / 70

0 ÷ 8

0

1

2

8

30 / 70

278

5

78

-7

354

364

344

334

31 / 70

3.4

6

6.9

16.3

15.9

15.3

16.9

32 / 70

5.2

4

6.7

14.9

15

15.6

15.9

33 / 70

146

5

63

-4

210

211

212

213

34 / 70

102 × 43

4,368

4,386

4,388

4,366

35 / 70

3²

7²

2²

231

232

222

212

36 / 70

14²

7²

2²

239

249

259

269

37 / 70

808 ÷ 8

100

101

110

104

38 / 70

40 ÷ 8

6

5

4

3

39 / 70

102 × 45

4,500

4,595

4,590

4,580

40 / 70

102 × 28

2,855

2,856

2,865

2,866

41 / 70

102 × 33

3,396

3,369

3,366

3,399

42 / 70

11.9

7

7.6

26.3

26.1

25.5

26.5

43 / 70

13 + 7.5 - 7

13

13.1

13.5

14.5

44 / 70

102 × 34

3,488

3,466

3,486

3,468

45 / 70

13

8.5

-5

16.5

16.3

16

15.5

46 / 70

72 ÷ 8

7

8

9

10

47 / 70

5²

7²

11²

215

205

195

185

48 / 70

5.6

6

8.5

20.7

20.2

20.1

20

49 / 70

32 ÷ 8

5

4

3

2

50 / 70

5²

7²

4²

80

90

100

110

51 / 70

297

7

56

-3

359

358

357

356

52 / 70

102 × 22

2,242

2,244

2,223

2,222

53 / 70

88 ÷ 8

12

11

10

9

54 / 70

299

4

88

-6

375

385

395

405

55 / 70

11

4.2

-5

10.9

10.7

10.2

11.2

56 / 70

16

2.8

-3

15.2

15.8

16

16.8

57 / 70

14

1.6

-2

12.6

13.6

14.6

15.6

58 / 70

8.1

9

5.1

23.2

22.1

22.2

21.2

59 / 70

10

4.7

-7

7.7

6.6

6.7

7.6

60 / 70

153

-8

83

-5

213

223

233

243

61 / 70

293

8

82

-5

378

377

375

373

62 / 70

182

-7

84

-7

142

152

252

242

63 / 70

13

9.8

-5

17.6

17.8

18

18.8

64 / 70

278

6

83

-6

364

362

361

360

65 / 70

25²

7²

8²

638

738

748

758

66 / 70

56 ÷ 8

4

5

6

7

67 / 70

149

4

63

-2

214

213

212

211

68 / 70

180

-6

83

-9

247

248

249

250

69 / 70

102 × 42

4,244

4,248

4,284

4,288

70 / 70

193

4

72

-6

263

265

269

273

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